Some metallic pipelines suffer from corrosion issues due to internal and external environmental conditions. The pipe-in-pipe technology has been developed by inserting a new pipe (e.g., plastic pipe or flexible pipe) into an existing pipeline. The pipe-in-pipe approach may be applicable to the reconstruction of an existing pipeline, where the existing pipe is used as protective casing and the inserted new pipe is used to contain corrosive petrochemicals. The new pipe is installed in the long existing pipeline with several bends. The magnitude of the pull-in load and the response of the inserted pipe are the major concerns during installation. This paper presents the installation process of inserting a plastic pipe into an existing steel pipe, based on model tests, finite element analysis (FEA), and analytical investigations. First, a series of model tests are presented. In order to optimize the process of installation, sensitivity analyses based on model tests were conducted to study the influence of some key parameters, including the radius of curvature of the pipeline and diameter of the pipe. Then ABAQUS finite element models were applied to analyze the major factors. In addition, analytical studies on calculating the pull-in load are presented to make a comparison with the FEA and model test results. Since little previous work has been done about simulating the installation process of this kind of rehabilitation, the proposed finite element analysis results and the analytical studies of the installation can serve as a feasibility study for the design and evaluation of offshore pipeline rehabilitation project.

References

References
1.
Elzink
,
W.
,
2006
, “
Compact Pipe & Neofit Quality in Pipeline Rehabilitation
,”
International Conference and Exhibition on Tunnelling and Trenchless Technology
,
Subang, Selangor, Malaysia
,
pp.
63
77
.
2.
Bethel
,
K.
,
Catha
,
S. C.
,
Kanninen
,
M. F.
,
Stonesifer
,
R. B.
,
Charbonneau
,
K.
,
Ekelund
,
A.
,
Mandich
,
I.
,
Mclntosh
,
R.
, and
Stringfellow
,
W. D.
,
2006
, “
The Design, Development and Validation of an Innovative High Strength, Self Monitoring, Composite Pipe Liner for the Restoration of Energy Transmission Pipelines
,”,
Proceeding of the 6th International Pipeline Conference
,
Calgary, Alberta, Canada
,
Paper No. IPC2006-10052
.
3.
Song
,
L. Z.
,
Zhang
,
W. L.
, and
Chen
,
Z.
,
2005
, “
Current Status and Development Trends of Pipe Rehabilitation Technology at Home and Abroad
,”
Chin. Water Wastewater
,
21
(
3
),
pp.
35
37
.
4.
Mochizuki
,
T.
,
Sakamoto
,
T.
,
Yamada
,
T.
,
Hayashi
,
T.
,
Ishii
,
K.
, and
Kagoura
,
T.
,
2003
, “
Experimental and Analytical Study for the Installation of Flexible Pipe in Existing Submarine Pipeline by Pipe-in-Pipe Technology
,”
Proceeding of the Thirteenth International Offshore and Polar Engineering Conference
,
Honolulu, Hawaii
,
pp.
44
51
.
5.
Polak
,
M. A.
, and
Lasheen
,
A.
,
2002
, “
Mechanical Modelling for Pipes in Horizontal Directional Drilling
,”
Tunneling and Underground Space Technology
,
16
,
Suppl. 1
,
pp.
47
55
.10.1016/S0886-7798(02)00020-2
6.
Polak
,
M. A.
, and
Chu
,
D.
,
2005
, “
Pulling Loads for Polyethylene Pipes in Horizontal Directional Drilling: Theoretical Modeling and Parametric Study
,”
J. Infrastruct. Syst.
,
11
(
2
),
pp.
142
150
.10.1061/(ASCE)1076-0342(2005)11:2(142)
7.
Cheng
,
E.
, and
Polak
,
M. A.
,
2007
, “
Theoretical Model for Calculating Pulling Loads for Pipes in Horizontal Directional Drilling
,”
Tunneling and Underground Space Technology
,
22
,
pp.
633
643
.10.1016/j.tust.2007.05.009
8.
ABAQUS, Inc.
,
2008
,
ABAQUS User's Manual Version 6.8
.
9.
Zhang
,
C.
, and
Moore
,
I. D.
,
1997
, “
Nonlinear Mechanical Response of High Density Polyethylene. Part I: Experimental Investigation and Model Evaluation
,”
Polym. Eng. Sci.
,
37
(
2
),
pp.
404
413
.10.1002/pen.11683
10.
Zhang
,
C.
, and
Moore
,
I. D.
,
1997
, “
Nonlinear Mechanical Response of High Density Polyethylene. Part II: Uniaxial Constitutive Modeling
,”
Polym. Eng. Sci.
,
37
(
2
),
pp.
414
420
.10.1002/pen.11684
11.
American Society for Testing and Materials
,
2008
, “
ASTM D 638-08 Standard Test Method for Tensile Properties of Plastics
,”
American National Standards Institute
,
New York
.
12.
Plastic Pipe Institute
,
2007
,
Handbook of Polyethylene Pipe
,
2nd ed.
,
Irving
,
Texas
,
Chap. 12
.
13.
Frisch-Fay
,
R.
,
1962
,
Flexible Bars
,
Butterworths
,
London, UK
,
pp.
73
80
.
14.
Howell
,
L. L.
, and
Midha
,
A.
,
1995
, “
Parametric Deflection Approximations for End-Loaded, Large-Deflection Beams in Compliant Mechanisms
,”
ASME J. Mech. Des.
,
117
(
1
),
pp.
156
165
.10.1115/1.2826101
15.
Dado
,
M. H.
,
2001
, “
Variable Parametric Pseudo-rigid-body Model for Large-Deflection Beams with End Loads
,”
Int. J. Non-Linear Mech.
,
36
,
pp.
1123
1133
.10.1016/S0020-7462(00)00076-7
You do not currently have access to this content.